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You searched for: subject:"CRYOGENICS"
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[texts]APPARATUS FOR DETERMINATION OF PRESSURE-DENSITY-TEMPERATURE RELATIONS AND SPECIFIC HEATS OF HYDROGEN TO 350 ATMOSPHERES AT TEMPERATURES ABOVE 14 DEG K - Goodwin, R. D
No Abstract Available
Keywords: CRYOGENICS; HYDROGEN
Downloads: 65
[image]Tech Transfer Office discusses the finer points of tire recycling - NASA/Stennis Space Center
NASA's Technology Transfer Office at Stennis worked with a tire recycling company in St. Francisville, La., to help the company make better use of the cryogenics, or supercold fluids, in its recycling process. The process separates the rubber from the steel belts and other particles. The rubber is broken down into a material called crumb. Other parts of the tire particle removed is called fluff.
Keywords: recycling, cryogenics, cryopolymers, tires
Downloads: 41
[texts]A sensitive cryogenic accelerometer - Chapman, P. K.
No Abstract Available
Keywords: ACCELEROMETERS; CRYOGENICS; SENSITIVITY
Downloads: 97
[texts]Toggle release - NON
A pyrotechnic actuated structural release device 10 which is mechanically two fault tolerant for release. The device 10 comprises a fastener plate 11 and fastener body 12, each attachable to a different one of a pair of structures to be joined. The fastener plate 11 and body 12 are fastenable by a toggle 13 supported at one end on the fastener plate and mounted for universal pivotal movement thereon...
Keywords: CRYOGENICS; REFRIGERATORS; CHEMISORPTION; PATENTS
Downloads: 64
[texts]Apparatus and method for lapping an edge surface of an object - NON
An apparatus for lapping an edge surface of an object comprises a block having a side adapted to engage a wide surface of an object, adjustable spacers disposed on the block and adapted to engage a lap plate, and a weighted spring disposed on the block for urging the spacers and the object edge surface towards the lap plate. A method for lapping comprises setting surfaces of adjustable spacers disposed on a block to be substantially the same distance from the block, affixing a wide surface of an...
Keywords: ADSORPTION; CRYOGENICS; KRYPTON; PATENTS
Downloads: 115
[texts]Experimental Physics at Low Temperatures - Lachlan Mackinnon
Lachlan Mackinnon Experimental Physics at Low Temperatures Wayne State University Press 1966 Acrobat 7 Pdf 9.23 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Cryogenics; Liquid Helium; Superconductivity; Metals
Downloads: 286
[texts]Cryogenic research and development for period ending september 30, 1963 progress report no. 11 - NON
Cryogenics - physical properties of fluids, solids and instrumentation
Keywords: CRYOGENIC EQUIPMENT; CRYOGENICS; SOLIDS; CRYOGENIC EQUIPMENT
Downloads: 75
[movies]NASA_Launchpad_Cryogenics_Transport_HD.mov
NASA_Launchpad_Cryogenics_Transport_HD.mov
Keywords: NASA_Launchpad_Cryogenics_Transport_HD.mov
Downloads: 97
[texts]Multinode reconfigurable pipeline computer - NON
A multinode parallel-processing computer is made up of a plurality of innerconnected, large capacity nodes each including a reconfigurable pipeline of functional units such as Integer Arithmetic Logic Processors, Floating Point Arithmetic Processors, Special Purpose Processors, etc. The reconfigurable pipeline of each node is connected to a multiplane memory by a Memory-ALU switch NETwork (MASNET)...
Keywords: CARBON; CONDUCTIVE HEAT TRANSFER; CRYOGENICS; PATENTS
Downloads: 143
[texts]InvestigationOrganizer: The Development and Testing of a Web-based Tool to Support Mishap Investigations - Carvalho, Robert F.
InvestigationOrganizer (IO) is a collaborative web-based system designed to support the conduct of mishap investigations. IO provides a common repository for a wide range of mishap related information, and allows investigators to make explicit, shared, and meaningful links between evidence, causal models, findings and recommendations. It integrates the functionality of a database, a common document repository, a semantic knowledge network, a rule-based inference engine, and causal modeling and v...
Keywords: CARBONATES; CHEMICAL REACTIONS; ISOTOPES; MARS ENVIRONMENT; MINERALS; CRYOGENICS
Downloads: 57
[texts]The effects of shock wave compaction on the transition temperatures of A15 structure superconductors - Otto, G. H
Several superconductors with the A15 structure exhibit a positive pressure coefficient, indicating that their transition temperatures increase with applied pressure. Powders of the composition Nb3Al, Nb3Ge, Nb3(Al0.75Ge0.25), and V3Si were compacted by explosive shock waves. The superconducting properties of these materials were measured before and after compaction and it was found that regardless of the sign of the pressure coefficient, the transition temperature is always lowered...
Keywords: CAPACITANCE; CRYOGENICS; PROPELLANTS; SPACE SHUTTLES; COST REDUCTION; PERFORMANCE TESTS; SENSORS
Downloads: 71
[texts]Soft X-ray observations: Experiment MA-048 - Shulman, S.
Celestial X-ray sources were observed in the energy range from 0.1 to 10 keV. Despite in-flight anomalies encountered in the operation of the experiment, X-ray spectra and fast time variability were measured and regions of enhanced emission in the X-ray background, an X-ray pulsar, and an X-ray emitting supernova remnant were detected. Results of observations of SMC x-1, extended low energy sources, and HZ 43 are briefly summarized.
Keywords: CRYOGENIC EQUIPMENT; CRYOGENIC FLUIDS; HEAT PIPES; CRYOGENICS; ETHANE; REFRIGERATING MACHINERY
Downloads: 56
[texts]Low temperature thermocouples: KP, normal silver, and copper versus Au-0.02 at% Fe and Au-0.07 at% Fe (Volume 76A) - Sparks, Larry L.
Journal of Research of the National Bureau of Standards
Keywords: Cryogenics; gold alloy; liquid helium; liquid hydrogen; liquid nitrogen; thermocouples
Downloads: 150
[texts]Resolution Enhancement of Spaceborne Radiometer Images - Krim, Hami
Our progress over the last year has been along several dimensions: 1. Exploration and understanding of Earth Observatory System (EOS) mission with available data from NASA. 2. Comprehensive review of state of the art techniques and uncovering of limitations to be investigated (e.g. computational, algorithmic ...). and 3. Preliminary development of resolution enhancement algorithms. With the advent of well-collaborated satellite microwave radiometers, it is now possible to obtain long time series...
Keywords: LAUNCHING BASES; MANAGEMENT SYSTEMS; SPACECRAFT LAUNCHING; CRYOGENICS; PROJECT MANAGEMENT
Downloads: 93
[texts]Thermal-distortion analysis of an antenna strongback for geostationary high-frequency microwave applications - Farmer, Jeffrey T.
The global change technology initiative calls for a geostationary platform for Earth science monitoring. One of the major science instruments is the high frequency microwave sounder (HFMS) which uses a large diameter, high resolution, high frequency microwave antenna. This antenna's size and required accuracy dictates the need for a segmented reflector. On-orbit disturbances may be a significant factor in its design...
Keywords: ABRASION RESISTANCE; ANTIFRICTION BEARINGS; CRYOGENICS; INTERFERENCE FIT; ROTATING SHAFTS; CLAMPS
Downloads: 143
[texts]MATRIX(sub x)Automated Testing Tool - Patterson-Hine, Ann
This research program has focused on developing tools and techniques that can automate the process of testing and troubleshooting complex control systems that are implemented using an autocoder. Significant increases in software complexity and sophistication have made software more difficult to test and trouble-shoot. Historically, the cost of debugging has been the most time-consuming and expensive aspect of large-scale software development...
Keywords: GRAVITY PROBE B; SCHEDULES; STAR TRACKERS; RELATIVISTIC EFFECTS; TELESCOPES; REFERENCE STARS; POLAR ORBITS; NEWTON THEORY; CRYOGENICS
Downloads: 18
[texts]Teeing Off With an Entirely New Material - NON
Liquidmetal(R) alloy is part of an entirely new class of vitrified metals, and is also known as metallic glass, or Vitreloy(R). A vitrified metal is a frozen liquid that fails to crystallize during solidification, unlike common metals such as titanium, steel, and aluminum. The technology takes the non-crystalline structure of glass and combines it with the properties of metal, a combination not found in nature, allowing for a product that offers the strength of a metal with the elasticity of a p...
Keywords: HUBBLE SPACE TELESCOPE; SPECTROMETERS; SATELLITE INSTRUMENTS; COOLING SYSTEMS; CRYOGENICS; DATA ACQUISITION; PERFORMANCE TESTS
Downloads: 28
[audio]WCA Ep 68 Fire v Ice - WRITE CLUB Atlanta
This week, filmmaker/writer/cardsharp Josh Wilcox gives us the hard sell versus playwright Theroun Patterson's firey take on a childhood memory.
Keywords: WRITE CLUB; Atlanta; podcast; Josh Wilcox; Theroun Patterson; fire; ice; cryogenics; matches
Downloads: 144
[texts]Laser Scanning System for Pressure and Temperature Paints - Sullivan, Joh
Acquiring pressure maps of aerodynamic surfaces is very important for improving and validating the performance of aerospace vehicles. Traditional pressure measurements are taken with pressure taps embedded in the model surface that are connected to transducers. While pressure taps allow highly accurate measurements to be acquired, they do have several drawbacks. Pressure taps do not give good spatial resolution due to the need for individual pressure tubes, compounded by limited space available ...
Keywords: AEROSPACE SYSTEMS; LAUNCH VEHICLES; LIQUID HYDROGEN; CRYOGENIC COMPUTER STORAGE; CYCLES; PROPELLANT TANKS; CRYOGENICS
Downloads: 62
[texts]Ice-Crystal Fallstreaks from Supercooled Liquid Water Parent Clouds - Campbell, James R.
On 31 December 2001, ice-crystal fallstreaks (e.g., cirrus uncinus, or colloquially ''Mare's Tails'') from supercooled liquid water parent clouds were observed by ground-based lidars pointed vertically from the Atmospheric Radiation Measurement Southern Great Plains (SGP) facility near Lamont, Oklahoma. The incidence of liquid phase cloud with apparent ice-phase precipitation is investigated. Scenarios for mixed-phase particle nucleation, and fallstreak formation and sustenance are discussed...
Keywords: ROCKET ENGINES; GAS VALVES; COMPUTATION; CRYOGENICS; GAS PRESSURE; CONTROL VALVES; LIQUID FLOW
Downloads: 76
[texts]The Integrated Medical Model: Statistical Forecasting of Risks to Crew Health and Mission Success - Fitts, M. A.
The Integrated Medical Model (IMM) helps capture and use organizational knowledge across the space medicine, training, operations, engineering, and research domains. The IMM uses this domain knowledge in the context of a mission and crew profile to forecast crew health and mission success risks. The IMM is most helpful in comparing the risk of two or more mission profiles, not as a tool for predicting absolute risk...
Keywords: CRYOGENICS; PROPELLANTS; PROPULSION; PROPULSION SYSTEM CONFIGURATIONS; CRYOGENIC TEMPERATURE; LIQUEFIED GASES; TECHNOLOGY UTILIZATION; PRESSURE VESSELS; HIGH PRESSURE
Downloads: 85
[texts]Lunar highland rock types: Their implications for impact induced fractionation - Phinney, W. C.
The first step in a petrologic study must be a classification based on observed textures and mineralogy. Lunar rocks, may be classified into three major groups: (1) coarse-grained igneous rocks, (2) fine-grained igneous rocks and (3) breccias. Group 1 is interpreted as primitive lunar crustal rocks that display various degrees of crushing and/or annealing. Group 2 is interpreted as volcanic rocks. Group 3 is interpreted as resulting from impacts on the lunar surface and is subdivided on the basi...
Keywords: CRYOGENICS; MULTILAYER INSULATION; PROPELLANT TRANSFER; TEMPERATURE CONTROL; HEAT TRANSFER; MICROGRAVITY; SPACE STORAGE
Downloads: 80
[texts]A new technique for measuring the internal pressure of sealed electrochemical cells - Sherfey, J. M.
No Abstract Available
Keywords: CRITICAL POINT; FLAT PLATES; NITROGEN; TEMPERATURE PROFILES; VELOCITY DISTRIBUTION; BUOYANCY; CRITICAL TEMPERATURE; CRITICAL VELOCITY; CRYOGENICS
Downloads: 91
[texts]Thermal conductivity standard reference materials from 4 to 300 K. I. Armco iron: Including apparatus description and error analysis (Volume 74A) - Hust, J.G.
Journal of Research of the National Bureau of Standards
Keywords: Cryogenics; equipment; electrical resistivity; error analysis; iron; Lorenz ratio; Seebeck effect; thermal conductivity; transport properties
Downloads: 93
[texts]Displays for supervisory control of manipulators - Bejczy, A. K.
The problem of displaying information generated by sensors attached to the terminal device of a remotely controlled manipulator is considered. The sensors under consideration are proximity, force-torque, tactile and slip-page sensors. The paper describes and evaluates several examples that have been implemented in the JPL teleoperator project using audio and graphic displays of information generated by four proximity sensors attached to a manipulator end effector...
Keywords: HYDROGEN; TECHNOLOGY TRANSFER; RESEARCH; TECHNOLOGY ASSESSMENT; THERMONUCLEAR REACTIONS; CRYOGENICS; HISTORIES; LIQUEFACTION; RESEARCH FACILITIES; SCIENTISTS
Downloads: 68
[texts]The ISS Fluids and Combustion Facility: Experiment Accommodations Summary - Corban, Robert R
The International Space Station's (ISS's) Fluids and Combustion Facility (FCF) is in the process of final design and development activities to accommodate a wide range of experiments in the fields of combustion science and fluid physics. The FCF is being designed to provide potential experiments with well defined interfaces that can meet the experimenters requirements, provide the flexibility for on-orbit reconfiguration, and provide the maximum capability within the ISS resources and constraint...
Keywords: DEFECTS; DEGRADATION; FUEL SYSTEMS; INSPECTION; LIQUID FUELS; THERMOGRAPHY; CRYOGENICS; INCLUSIONS; NONDESTRUCTIVE TESTS
Downloads: 59
[texts]The application of a computer data acquisition system for a new high temperature tribometer - Bonham, Charles D.
The two data acquisition computer programs are described which were developed for a high temperature friction and wear test apparatus, a tribometer. The raw data produced by the tribometer and the methods used to sample that data are explained. In addition, the instrumentation and computer hardware and software are presented. Also shown is how computer data acquisition was applied to increase convenience and productivity on a high temperature tribometer.
Keywords: COOLING; CRYOGENICS; LIQUID HELIUM; LIQUID HELIUM 2; LOOPS; SUPERFLUIDITY; DESIGN ANALYSIS; PERFORMANCE TESTS
Downloads: 98
[texts]Reduction of Tunnel Dynamics at the National Transonic Facility (Invited) - Kilgore, W. A.
This paper describes the results of recent efforts to reduce the tunnel dynamics at the National Transonic Facility. The results presented describe the findings of an extensive data analysis, the proposed solutions to reduce dynamics and the results of implementing these solutions. These results show a 90% reduction in the dynamics around the model support structure and a small impact on reducing model dynamics...
Keywords: CRYOGENICS; BALANCE; TECHNOLOGY ASSESSMENT; CALIBRATING; TRANSONIC WIND TUNNELS; TEMPERATURE MEASUREMENT; RESEARCH; DESIGN ANALYSIS
Downloads: 81
[texts]Carbon resistors for cryogenic liquid level measurement - Muhlenhaupt, R. C.
Carbon resistors for cryogenic liquid-level measurement
Keywords: CARBON; CRYOGENIC EQUIPMENT; CRYOGENICS; LIQUID LEVELS; RESISTORS; CARBON; CRYOGENIC EQUIPMENT; LIQUID LEVEL; RESISTOR
Downloads: 103
[texts]BOREAS HYD-5 Winter Surface Flux Data - Harding, Richar
The BOREAS HYD-5 team collected tower flux, surface meteorological, and surface temperature data on a frozen lake (Namekus Lake) and in a mature jack pine forest in the Beartrap Creek watershed. Both sites were located in the BOREAS SSA. The objective of this study was to characterize the winter energy and water vapor fluxes, as well as related properties (such as snow density, depth, temperature, and melt) for forested and nonforested areas of the boreal forest...
Keywords: ALUMINUM ALLOYS; FILLERS; COPPER; FUSION WELDING; TENSILE PROPERTIES; WELDING; WIRE; CRYOGENICS; FRACTURE STRENGTH
Downloads: 58
[texts]Flight Data Analysis of HyShot 2 - Hass, Neal E.
The development of scramjet propulsion for alternative launch and payload delivery capabilities has comprised largely of ground experiments for the last 40 years. With the goal of validating the use of short duration ground test facilities, the University of Queensland, supported by a large international contingency, devised a ballistic re-entry vehicle experiment called HyShot to achieve supersonic combustion in flight above Mach 7.5...
Keywords: WATER VAPOR; RADAR MEASUREMENT; RADIOSONDES; OPTICAL RADAR; ACCURACY; CRYOGENICS; HYGROMETERS; RADIANCE; TROPOSPHERE
Downloads: 117
[texts]The development test flight of the flight telerobotic servicer - Andary, J.
The Development Test Flight (DTF-1) is the first of two shuttle flights to test operations of the Flight Telerobotic Servicer (FTS) in space and to demonstrate its capabilities in performing tasks for Space Station Freedom. The DTF-1 system, which Martin Marietta Astronautics Group is designing and building for the Goddard Space Flight Center, will be flown in December, 1991, as an attached payload on the shuttle...
Keywords: CRYOGENIC WIND TUNNELS; WIND TUNNEL MODELS; WIND TUNNEL TESTS; ANNOTATIONS; CRYOGENICS; LIQUID NITROGEN; REYNOLDS NUMBER
Downloads: 87
[texts]Characterization of Unsteady Flow Structures Around Tandem Cylinders for Component Interaction Studies in Airframe Noise - Jenkins, Luther N.
A joint computational and experimental study has been performed at NASA Langley Research Center to investigate the unsteady flow generated by the components of an aircraft landing gear system. Because the flow field surrounding a full landing gear is so complex, the study was conducted on a simplified geometry consisting of two cylinders in tandem arrangement to isolate and characterize the pertinent flow phenomena...
Keywords: TECHNOLOGY UTILIZATION; VOLTAGE CONVERTERS (DC TO DC); CRYOGENICS; PROTOTYPES; EFFICIENCY; NASA SPACE PROGRAMS
Downloads: 106
[texts]An OFDM System Using Polyphase Filter and DFT Architecture for Very High Data Rate Applications - Kifle, Muli
This paper presents a conceptual architectural design of a four-channel Orthogonal Frequency Division Multiplexing (OFDM) system with an aggregate information throughput of 622 megabits per second (Mbps). Primary emphasis is placed on the generation and detection of the composite waveform using polyphase filter and Discrete Fourier Transform (DFT) approaches to digitally stack and bandlimit the individual carriers...
Keywords: ALUMINUM ALLOYS; CRYOGENICS; MECHANICAL PROPERTIES; FATIGUE LIFE; RESIDUAL STRESS; STRESS CORROSION CRACKING; TENSILE STRENGTH
Downloads: 115
[texts]Progress report Atlas Booster program for NASA Project Mercury, 1-31 August 1961 - NON
No Abstract Available
Keywords: APOLLO PROJECT; PROJECT MANAGEMENT; SPACECRAFT DESIGN; CRYOGENICS; ELECTRIC POWER; SPACECRAFT RELIABILITY; SYSTEMS ENGINEERING
Downloads: 141
[texts]Use of NASA Land Data Assimilated (LDAS) Products to Improve Flood and Drought Risk Analysis and Forecasting for Water Resources Management in the Columbia River Basin - Arsenault, Kristi R.
The main objective of the project is to demonstrate the value added by information from satellite, radar, and the Land Surface Data Assimilation System (LDAS) toward the improvement of flood and drought risk analyses and forecasts. These products will be tested by water resource managers in the Yakima River Basin and further developed and adapted by Reclamation researchers at the main Denver office
Keywords: AEROGELS; INSULATION; GRAPHITE-EPOXY COMPOSITES; STRUCTURAL ANALYSIS; PERMEABILITY; CRYOGENICS; STORAGE TANKS; SPHERICAL TANKS; VACUUM; SILICON DIOXIDE
Downloads: 83
[texts]OpenMP Experiences and Comparisons - Nelson, Terr
The document discusses message passage interfaces (MPI), open message passage issues and parallelization. A comparison of the two vector platforms, C90 and SVlex is presented. Sections of the document are written in computer code.
Keywords: TECHNOLOGY UTILIZATION; AEROGELS; THERMAL INSULATION; AEROSPACE TECHNOLOGY TRANSFER; CRYOGENICS; FURNACES; REFRIGERATORS; THERMAL CONDUCTIVITY
Downloads: 105
[texts]Review of static seals for cryogenic systems - Ludtke, P. R.
Static seals for cryogenic systems - bibliography
Keywords: CRYOGENIC STORAGE; CRYOGENICS; GASKETS; O RING SEALS; SEALING; CRYOGENIC STORAGE; GASKET; SEALING
Downloads: 119
[texts]Data collection and preparation of authoritative reviews on space food and nutrition research - NON
The collection and classification of information for a manually operated information retrieval system on the subject of space food and nutrition research are described. The system as it currently exists is designed for retrieval of documents, either in hard copy or on microfiche, from the technical files of the MSC Food and Nutrition Section by accession number, author, and/or subject. The system could readily be extended to include retrieval by affiliation, report and contract number, and spons...
Keywords: CAVITATION CORROSION; OXIDATION; ULTRASONICS; ZINC; LIQUID OXYGEN; METALS; WATER; COPPER; CRYOGENICS; IRON; LEAD (METAL); NICKEL
Downloads: 79
[texts]Stress analysis and failure of an internally pressurized composite-jacketed steel cylinder - Chen, Peter C. T
This paper presents a nonlinear stress analysis of a thick-walled compound tube subjected to internal pressure. The compound tube is constructed of a steel liner and a graphite-bismaleimide outer shell. Analytical expressions for the stresses, strains, and displacements are derived for all loading ranges up to failure. Numerical results for the stresses and the maximum value that the compound tube can contain without failure are presented.
Keywords: CRYOGENICS; ELECTRONIC EQUIPMENT; MEASURING INSTRUMENTS; MINIATURIZATION; PRESSURE SENSORS; DIES; PRESSURE MEASUREMENT; SILICON
Downloads: 104
[texts]A TRMM-Calibrated Infrared Rainfall Algorithm Applied Over Brazil - Negri, A. J.
The development of a satellite infrared technique for estimating convective and stratiform rainfall and its application in studying the diurnal variability of rainfall in Amazonia are presented. The Convective-Stratiform. Technique, calibrated by coincident, physically retrieved rain rates from the Tropical Rain Measuring Mission (TRMM) Microwave Imager (TMI), is applied during January to April 1999 over northern South America...
Keywords: HIGH REYNOLDS NUMBER; RESEARCH FACILITIES; EXPERIMENTATION; AERODYNAMIC CHARACTERISTICS; CRYOGENICS; RESEARCH AND DEVELOPMENT
Downloads: 75
[texts]Contribution of thermal noise to the line width of Josephson radiation from superconducting point contacts - Kamper, R. A.
Contribution of thermal noise to line width of Josephson radiation from superconducting point contacts
Keywords: JOSEPHSON JUNCTIONS; LINE SPECTRA; THERMAL NOISE; CRYOGENICS; ELECTRIC CONTACTS; FREQUENCY MODULATION; RADIATION SPECTRA; THERMOMETERS; VOLTMETERS
Downloads: 83
[texts]Many-body Effects in a Laterally Inhomogeneous Semiconductor Quantum Well - Ning, Cun-Zheng
Many body effects on conduction and diffusion of electrons and holes in a semiconductor quantum well are studied using a microscopic theory. The roles played by the screened Hartree-Fock (SHE) terms and the scattering terms are examined. It is found that the electron and hole conductivities depend only on the scattering terms, while the two-component electron-hole diffusion coefficients depend on both the SHE part and the scattering part...
Keywords: MASS SPECTROSCOPY; QUADRUPOLES; SPACE SHUTTLES; GROUND SUPPORT SYSTEMS; LEAKAGE; DETECTION; CRYOGENICS
Downloads: 78
[texts]The pumping speed for carbon dioxide by the action of a surface cooled by liquid nitrogen at gas temperatures ranging from 136 deg K to 548 deg K - Saenger, G
Pumping speed for carbon dioxide by action of surface cooled by liquid nitrogen
Keywords: CARBON DIOXIDE; THERMAL CONDUCTIVITY; CRYOPUMPING; LIQUID NITROGEN; SURFACE COOLING; ABSORPTIVITY; CONDENSATES; CRYOGENICS; SURFACE REACTIONS; TEMPERATURE GRADIENTS
Downloads: 94
[texts]A simple algorithm for rotating the plane of an orbit in the central and noncentral gravitational field of the earth - Veselovskiy, V. V
Algorithm for rotating orbital plane of satellite in central and noncentral earth gravitational field
Keywords: CIRCUIT DIAGRAMS; CRYOGENICS; ELECTRIC DISCHARGES; ELECTRIC ENERGY STORAGE; SEMICONDUCTORS (MATERIALS); MAGNETIC FIELDS; SUPERCONDUCTING MAGNETS
Downloads: 78
[texts]Poly(arylene ether-co-imidazole)s as toughness modifiers for epoxy resins - NON
A toughened epoxy was prepared by reacting an epoxy resin with a poly(arylene ether-co-imidazole)s (PAEI). The epoxy resin comprises N,N,N',N'tetraglycidyl-4,4'- methylenebisbenzenamine and 4-aminophenyl sulfone. The PAEI was prepared by reacting an aromatic bisphenol, a bisphenol imidazole, and an activated aromatic dihalide or dinitro compound in the presence of potassium carbonate in a polar aprotic solvent at an elevated temperature...
Keywords: CRYOGENICS; FOAMS; SPRAYING; THERMAL INSULATION; PROTECTIVE COATINGS; SPRAYED COATINGS; TOXICITY; WIND TUNNEL TESTS
Downloads: 69
[texts]Pilot-Induced Oscillation Research: Status at the End of the Century - NON
The workshop ''Pilot-Induced Oscillation Research: The Status at the End of the Century,'' was held at NASA Dryden Flight Research Center on 6-8 April 1999. The presentations at this conference addressed the most current information available, addressing regulatory issues, flight test, safety, modeling, prediction, simulation, mitigation or prevention, and areas that require further research. All presentations were approved for publication as unclassified documents with no limits on their distri...
Keywords: GAS DETECTORS; PNEUMATICS; ELECTRIC POWER; MASS SPECTROMETERS; CRYOGENICS; SPACE SHUTTLES; LEAKAGE; FUELS; DESIGN ANALYSIS; HELIUM; NITROGEN
Downloads: 260
[texts]Optimum predetection diversity receiving system Patent - Honey, R. W.
Development of optimum pre-detection diversity combining receiving system adapted for use with amplitude modulation, phase modulation, and frequency modulation systems
Keywords: LIQUID-GAS MIXTURES; PROPELLANT TRANSFER; PUMPS; SEPARATORS; VAPOR PRESSURE; CRYOGENICS; SPACE COMMERCIALIZATION; SYSTEMS ENGINEERING
Downloads: 64
[texts]Mobile Aerial Tracking and Imaging System (MATrIS) for Aeronautical Research - Banks, Daniel W.
A mobile, rapidly deployable ground-based system to track and image targets of aeronautical interest has been developed. Targets include reentering reusable launch vehicles as well as atmospheric and transatmospheric vehicles. The optics were designed to image targets in the visible and infrared wavelengths. To minimize acquisition cost and development time, the system uses commercially available hardware and software where possible...
Keywords: GASES; TRANSONIC WIND TUNNELS; GROUND BASED CONTROL; WIND TUNNEL CALIBRATION; CONSTRUCTION; CRYOGENICS; FLUORINE COMPOUNDS; INTEGRATED MISSION CONTROL CENTER; TURBOCOMPRESSORS
Downloads: 52
[texts]A Minimal Radio and Plasma Wave Investigation For a Mercury Orbiter Mission - Kurth, W. S
The primary thrust of the effort at The University of Iowa for the definition of an orbiter mission to Mercury is a minimum viable radio and plasma wave investigation. While it is simple to add sensors and capability to any payload, the challenge is to do reasonable science within limited resources; and viable missions to Mercury are especially limited in payload mass. For a wave investigation, this is a serious concern, as the sensor mass often makes up a significant fraction of the instrumenta...
Keywords: MATHEMATICAL MODELS; STEADY STATE; CRYOGENICS; LIQUID FLOW; WORKING FLUIDS; HEAT TRANSFER; COOLING; MASS FLOW RATE; PIPES (TUBES); ALUMINUM
Downloads: 101
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